Lexus SC300 / Lexus SC400. Manual — part 646
11. REMOVE LH NO.3 TIMING BELT COVER
(a) Remove the four mounting bolts.
(b) Disconnect
the cord grommet from the timing belt cover,
and remove the timing belt cover.
(c) Remove the cord grommet from the high–tension cord.
12. REMOVE LOWER HIGH–TENSION CORD COVER
(a) Disconnect the high–tension cord from the RH ignition
coil.
(b) Disconnect the high–tension cords from the
high–tension cord cover.
(c) Remove the bolt and cord cover.
13. REMOVE THROTTLE BODY
(a) Disconnect the following connectors:
(1) Throttle position sensor connector
(2) (w/
TRAC)
Sub–throttle position sensor connector
(3) (w/
TRAC)
Sub–throttle actuator connector
(b) Disconnect the following hoses:
(1) Heat water hose from heater water valve
ST–8
–
STARTING SYSTEM
Starter
(2) Water by–pass hose from ISC valve
(3) (USA
Spec.)
Vacuum hose from throttle body
(4) (Exc. USA Spec.)
Three vacuum hoses from throttle body
(c) Remove the two bolts and two nuts, disconnect the
throttle body from the air intake chamber.
(d) Disconnect the following hoses, and remove the throttle
body:
(1) PCV hose from throttle body
(2) Water by–pass hose from throttle body
(e) Remove the throttle body gasket.
14. DISCONNECT
CONNECTORS
Disconnect the following connectors:
•
Cold start injector connector
•
ISC valve connector
•
(USA Spec.)
EGR Valve connector
•
(Exc. USA Spec.)
VSV connector for EGR system
•
VSV connector for fuel pressure control system
–
STARTING SYSTEM
Starter
ST–9
15. DISCONNECT HOSES
Disconnect the following hoses:
(1) Water by–pass hose (from water inlet housing)
from ISC valve
(2) Vacuum
hose (from PS air control valve) from air in-
take chamber
(3) Vacuum sensing hose (from fuel pressure regula-
tor) from vacuum pipe
(4) Two vacuum hoses (from VSV for EVAP system)
from vacuum pipe
(5) Vacuum hose (from charcoal canister) from vacu-
um pipe.
(6) Water by–pass hose (from EGR valve) from water
by–pass pipe
(7) Vacuum hose (from brake booster) from air intake
chamber
(8) Vacuum hose (from VSV for heater water valve)
from air intake chamber
(9) PCV hose from LH cylinder head cover
16. REMOVE AIR INTAKE CHAMBER
(a) Remove the bolt, stud bolt and accelerator bracket.
ST–10
–
STARTING SYSTEM
Starter
(b) Remove the union bolt and two gaskets, and disconnect
the cold start injector tube from the RH delivery pipe.
(c) Remove the two bolts and gasket, and disconnect the
EGR pipe from the air intake chamber.
(d) Remove the four bolts, eight nuts and A/T throttle cable
bracket.
(e) (USA
Spec.)
Disconnect the check (”DIAGNOSIS”) connector brack-
et from the air intake chamber.
(f) (Exc. USA Spec.)
Remove the connector bracket from the check
(”DIAGNOSIS”) connector.
(g) Remove the air intake chamber assembly and four
gaskets.
17. DISCONNECT FUEL INLET HOSE FROM LH DELIVERY
PIPE
Remove the pulsation damper and two gaskets, and discon-
nect the inlet hose.
18. DISCONNECT FUEL RETURN HOSE FROM FUEL
RETURN PIPE
–
STARTING SYSTEM
Starter
ST–11
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